Convoys can be necessary.Logical formLearned from15 sentences. (Austerity measures) can be necessary.Logical formLearned from15 sentences. Measures can be necessary for protection of a country.Logical formLearned from15 sentences. Decisions can be necessary for survival of a country.Logical formLearned from15 sentences. Necessary conditions can be for a dialogue.Logical formLearned from15 sentences. A reshuffle can be necessary.Logical formLearned from15 sentences. Attacks can be necessary.Logical formLearned from15 sentences. Some months can be necessary.Logical formLearned from15 sentences. A momentum can be necessary.Logical formLearned from15 sentences. A will can be necessary.Logical formLearned from15 sentences. A (coaching change) can be necessary.Logical formLearned from15 sentences. Scientific knowledge can be necessary.Logical formLearned from14 sentences. A guarantee can be necessary.Logical formLearned from14 sentences. A coalition can be necessary.Logical formLearned from14 sentences. A certificate can be necessary.Logical formLearned from14 sentences.